PlantFiles: Mandarin Orange, Satsuma, Tangerine
Citrus reticulata 'Clementine'

This is actually Citrus reticulata x Citrus auratium.

It is easily hybridized and in 2006 one of the larger California growers threatened to sue beekeepers for allowing their bees to trespass into Clementine crop areas.

Primarily grown in Spain and Northern Africa, Clementines gained popularity in the United States after the 1997 Florida freeze.

Father Clement Rodier, a missionary priest in Algeria, is said to have discovered and named them in 1902. Some track the origin centuries before to the Chinese variety called the Canton Mandarin.